Gesellschaft



June 21, 1927,

Inventor: %w6 Way K MEN$|NG LAMP SUPPORT Filed Julv 22 1925 Patented June 21, 1927.

' UNITED STATES 1,633,538 PATENT OFFICE.

KARL MENSING, OF HANAU, GERMANY, ASSIGNOR TO THE FIRM: QUARZLAMPEN- GESELLSCHAFT, 'M. B. 131., OF HANAU, GERMANY.

LAMP surron'r.

Application filed July 22, 1925, Serial No, 45,388,. and in Germany April 4, 1925.

which can easily be assembled by unskilled v hands. a

As is well known to those skilled in the art, quartz lamps operated by alternating current require a transformer plant consist ing of the transformer proper, a comparatively large choking coil and in the major ity of cases also of some resistance cylinders and the switching device appertaining thereto. In the lampshitherto known, t-h1s transformer plant, in order to take up the least possible space, was designed as a separate unit not structurally connected with the quartz lamp itself. In view of this arrangement the supports or stands of the quartz lamp serving for medical irradiation had to be provided with comparatively heavy pedestals in order to be sufficiently stable. These pedestals were either solid cast iron blocks or legs or else hollow sheet metal structures which were weighted subsequently by filling in a suitable material such as sand.

In the lamp support according to the present invention the transformer plant spoken of above is arranged to take the place of the.

stabilizing weight required for the support or stand, and any dead weight hitherto required for this purpose can now be dispensed with altogether. The pedestal can now be formed as a simple plate made of cast iron or stamped and pressed of sheet metal and to which the legs can be attached in any suitable manner.

In order to provide for as simple and convenient an assembling of the novel support as possible, provision is made for clamping all the parts to the pedestal plate in an easily disengageable manner, for instance by means of screw bolts,.or clips, and in the latter case the correct osition of the parts is warranted by chec provided on the plate while all subsequent machining is dispensed with by making the fastening holes, which are either cast or stamped in the plate, sufficiently large." I thereby obtain that the entire support can be assembled without requiring anymachining, boring or this end I mount the lower end of the standard in a preferably funnel-shaped depression of the base plate, and the standard is further held in place at a point higher up by a sleeve mounted thereon and which is adjust-ably fixed to the transformer by clamping. Once this sleeve is correctly adusted, the standard is also mounted in exact vertical position without being able to get loose again and without any guides, borings, threads or the like requiring careful machining being required. A further advantage arising from this mode of assembling consists therein that the entire interior of the preferably hollow standard remains unobstructed, so that it can serve throughout its length for the reception of the counterweight for the displaceable arm carrying the lamp.

The assembling of the support is preferably effected the first time by means of a particular gauge which shall be described further below. I I

In the drawings affixed to this specification and forming part thereof a lamp support embodying my invention is illustrated diagrammatically by way of example. In the drawings Fig. 1 is a vertical section,

Fig. 2 is another vertical section taken at right angles to Fig. 1,

Fig. 3 is a plan view with the cover removed,

Fig. 4 is a third vertical section at right angles to Fig. 1, and

Fig. 5 shows a detail.

Referring to the drawings, a is the base plate serving to support and hold together all the parts of the lamp stand. This plate may consist of thin-walled cast iron or of stamped and pressed sheet iron, and has three or four legs I") fixed to it by casting or bolting. vided a preferably funnel-shaped depression 0, which is designed to receive the bottom end of the tubular standard (Z, which either In the centre of the plat-e is pro inc III

.tures they have comparatively lar rests inthe depression 0 by friction or is supported by a flange 2 extending inwards from the bottom end of the depression; In

this manner the bottom opening of the standard (Z is entirely unobstructed} In the base plate a all holes required for the fixation of the different parts of the apparatus are previously formed by casting or stamping, and also all checks 6 are formed thereon by casting or pressing which serve as abutments to secure the several parts in correct position on the base plate.

The single parts of the transformer plant are mounted on the plate a in such manner as to evenly distribute their weight around the standard (Z. The transformer f is fixed in place by means 01' two clips 9, the choking coil h by means of a clip 2', arranged to be held down on the plate by means of nuts. On the top of the transformer there is fixed by means of the clips g a sheet metal plate 7; which carries the switch Z for the transformer and a tubular sleeve wt preferably fixed to the plate by soldering. The sleeve m is slotted and serves for holding the standard which is clamped fast in it by means of a clip or ring a. On the sheet metal plate 7; there can further be fixed in an insulated manner two contact pins for the current supply and three contact pins for the other pole.

By means of the clip z' of the choking coil ii there is fixedin place in a similar manner the short-circuiting device by means of which the alternating current lamp is lighted. As illustrated in Fig. at this device comprises a press button 0, a contact spring 22 and two contact pins 9, to which are connected wires lea-din to a disconnectable part of the re sistance bolt, further a small armature r by means of which the shOrt-circuiting device can be held in the closed position by the choking coil traversed by the current. The resistance cylinders s are arranged 011 the base plate intermediate the transformer and the choking coil on either side of the standard (Fig. 3) and are fixed to the plate by screw bolts 2,.

The said apparatus mounted on the plate a and including the transformer is covered by a. hood it provided with ventilation holes. This hood is also fixed in place with simple means requiring no careful adaptation. The hood is applied against the base plate by means of the clip n serving for clamping the standard (Z in place. The hood is centered on the plate by means of a ledge, groove or the like, formed in the plate by casting. Apertures are formed on the top side of the hood through which are projecting the transformer switch and the press button for the short cir'c'ui-tin'g device. In, order to avoid careful adaptation of theseholes' andaperdime ti'g htl'y surters. An ornamental ring '23,

sorted must assume the correct position.

rounding the switch or press button, serves for covering the annular gap between the switch or press button and the hood.

As shown in the drawings, the pedestal thus designed can be assembled in the simplest manner with the aid of screw bolts, without requiring any machining. It the sleeve m serving to correctly center the plate 7c is fixed in correct position, the standard (Z owing to the great distance between its bottom edge and the clip a is securely mounted in position.

The adjusting of the standard (Z and the assembling in general is preferably carried out by means of a gauge formed with fixed points for the exact vertical position of the standard and for the exact horizontal ost tion of the base pl: te or the plane oi the pedestal rollers. Provided that the standard and base plate are lixed in place within this gauge, they cannot later on assume an oblique position. Preferably the parts are assembled in inverted position, the gauge carrying a vertical rod on which first of all sleeve m is placed together with the plate 7; and the switch Z mounted thereon, the sleeve being loosely fixed in position, where upon the clips g and i are inserted and are thereby held in position in a prm'isional manner so that the transformer and the choking coil can be mounted. Now the base plate, on which the legs have been fixed. is placed on the ends of the bolts and on the rod carried by the gauge so far that the end of the rod abuts against the tunnelshaped extension oi the base plate. This plate is now adjusted in correct cyliiulrical position, whereupon the nuts of the clips are screwed down for good. It the plate with the sleeve m correctly mounted thereon is now lifted tree of the gauge, the standard (Z after being subsequently in- In the same manner the other parts or the pedestal are now mounted in place from above.

In order to prevent displacement of the parts which are only held in place by trim tion, for instance through transport, l pre fer inserting between the adjoining faces wrapping paper which varnished on both sides and not thoroughly dried. Eluch paper will adhere to the parts so tightly that all displacement of the parts is entirely excluded.

I wish it to, be understood that I do not desire to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

l Electric lamp support comprising a base plate, ahood covering said plate, a standardsupported in a: centric depression of said plate and extending through a" centrio opening in said hood, a transformer and a choke coil removabl fixed on said plate around said standar feet elements removably fixed to said plate and a sleeve embracing said standard near the upper part of said hood and removably fixed to one of the parts fixed on said plate.

2. Electric lamp support comprising a base plate, a hood covering said plate, a standard supported in a centric depression of said plate and extending through a centric opening in said hood, a transformer and choke coil removably fixed on said plate around said standard, feet elements removably fixed to said plate and a sleeve embracing said standard near the upper partof said hood and removably fixed to one of the parts fixed on said plate, clamping means being provided for removably fixing said parts to one another and screw nuts on the underside of said plate for locking said clamping means in position.

3. Electric lamp support comprising a base plate, a hood covering said plate, a standard supported in a funnel-shaped centric depression of said plate and extending through a centric opening in said hood, a transformer and choke c011 removably fixed on said plate around said standard, feet elements removably fixed to said plate and a sleeve embracing said standard near the upper part of said hood and adjustably secured to one of the parts fixed on said plate.

4. Electric lamp support comprising a base plate, a hood covering said plate, a standard supported in a funnel-shaped centric depression of said plate and extending through a centric opening in said hood, a

transformer and choke coil re-movably fixed on said plate around said standard, feet elements removably fixed to said plate, a sleeve embracing said standard near the upper part of said hood and adjustably secured to one of the parts fixed on said plate and means for securing said part together with said sleeve to said plate.

5. Electric lamp support comprising a base plate, a hood covering said plate, a standard supported in a centric depression of said plate and extending through a centric opening in said hood, a transformer and choke coil removably fixed on said plate around said standard, feet elements removably fixed to said plate and a sleeve embracing said standard near the upper part of said hood and adjustably fixed to one of the parts fixed on said plate, a U-shaped tie bolt fixing said sleeve to said part and together With it to said plate.

6. Electric lamp support comprising a base plate, a cylindrical shell on said plate, a flanged cover on said shell secured against horizontal displacement, a standard supported in a funnel-shaped centric depression of said plate and extending through a cen tric opening in said cover, a transformer and choke coil removably fixed on said plate around said standard, feet elements removably fixed to said plate, a sleeve embracing said standard near theupper part of said cover and adjustably secured to one of the parts fixed on said plate, and a clip embracing said sleeve and resting on said cover.

In testimony whereof 1 afiix my signature.

KARL MENSIN G. 

